43
10) Flywheel and ring gear
Inspection
Check the ring gear and replace if damage or remarkable
wear is noticed.
When the wear is limited to a small area, remove the, ring
gear, turn it about 90 degrees and shrinkage-fit to reuse it.
To shrinkage-fit the ring gear, heat it to 120 – 150°C to
allow it to expand.
11) Cam shaft ass’y
Inspection
(1) Check the journal and cam for wear and damage and
replace if the service limit is exceeded.
(2) Correct insignificant uneven wear or scars on the cam
surface using oil stone or the like.
A. Height of intake/exhaust valve cams (mm)
Standard assembling value Service limit
34.441－34.508
34.1
B. Height of injection pump cams (mm)
Standard assembling value Service limit
42.99－43.01
42.8
12) Timing gear
Inspection
(1) If pitting or remarkable wear is observed on the tooth
face of gears, replace the gear.
(2) Measure the backlash of gears and replace if the service
limit is exceeded.
Timing gear backlash (mm)
Standard assembling value Service limit
0.08 More than 0.25
135Y
136Y
137Y
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